diff --git a/src/Adapter/Ldap.php b/src/Adapter/Ldap.php
index 2fe03f1..f6bf3d2 100644
--- a/src/Adapter/Ldap.php
+++ b/src/Adapter/Ldap.php
@@ -149,8 +149,8 @@ class Ldap implements \Ulmus\Adapter\AdapterInterface {
             case static::IDENTIFIER_DN:
                 return ldap_escape($segment, $ignore, LDAP_ESCAPE_DN);
 
-            case static::IDENTIFIER_FIELD:
             case static::IDENTIFIER_FILTER:
+            case static::IDENTIFIER_FIELD:
                 return ldap_escape($segment, $ignore, LDAP_ESCAPE_FILTER);
 
             default:
diff --git a/src/Annotation/Classes/ObjectClass.php b/src/Annotation/Classes/ObjectClass.php
new file mode 100644
index 0000000..8a57aee
--- /dev/null
+++ b/src/Annotation/Classes/ObjectClass.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace Ulmus\Ldap\Annotation\Classes;
+
+class ObjectClass implements \Ulmus\Annotation\Annotation {
+
+    public string $type;
+
+    public function __construct($type = null)
+    {
+        if ( $type !== null ) {
+            $this->type = $type;
+        }
+    }
+}
diff --git a/src/Common/LdapObject.php b/src/Common/LdapObject.php
index e882770..45c18bc 100644
--- a/src/Common/LdapObject.php
+++ b/src/Common/LdapObject.php
@@ -64,9 +64,9 @@ class LdapObject {
 
     public function select(array $filter, array $fields = [])
     {
-        static::$dump && call_user_func_array(static::$dump, [ $sql, $parameters ]);
+        static::$dump && call_user_func_array(static::$dump, [ $filter, $fields ]);
 
-        $this->search = ldap_search($this->connection, $this->dn, $filter['filters'], $filter['fields'], 0, $filter['limit'] ?? -1);
+        $this->search = ldap_search($this->connection, $this->dn, $filter['filters'], $filter['fields'], 0, 0);
 
         $this->rowCount = $this->bufferedRows = ldap_count_entries($this->connection, $this->search);
 
@@ -75,18 +75,20 @@ class LdapObject {
 
     public function fetch() /* : bool|array */
     {
+        static $result;
+
         if (! $this->search ) {
             throw new \Exception('Impossible to fetch from LdapObject from which select() was not called first.');
         }
 
         if ( ! $this->bufferedRows ) {
-            return false;
+            return $result = false;
         }
         if ( $this->rowCount === $this->bufferedRows ) {
             $result = ldap_first_entry($this->connection, $this->search);
         }
         else {
-            $result = ldap_next_entry($this->connection, $this->search);
+            $result = ldap_next_entry($this->connection, $result);
         }
 
         if ($result) {
@@ -119,56 +121,4 @@ class LdapObject {
     }
 
     public function closeCursor() : void {}
-
-    public function runQuery(string $sql, array $parameters = [])
-    {
-        static::$dump && call_user_func_array(static::$dump, [ $sql, $parameters ]);
-
-        try {
-            if (false !== ( $statement = $this->prepare($sql) )) {
-                return $this->execute($statement, $parameters, true);
-            }
-        }
-        catch (\PDOException $e) {
-            throw new \PdoException($e->getMessage() . " `$sql` with data:" . json_encode($parameters));
-        }
-
-        return null;
-    }
-
-    public function execute(PDOStatement $statement, array $parameters = [], bool $commit = true)
-    {
-        try {
-            if ( ! $this->inTransaction() ) {
-                $this->beginTransaction();
-            }
-
-            if (empty($parameters) ? $statement->execute() : $statement->execute($parameters)) {
-                $statement->lastInsertId = $this->lastInsertId();
-
-                if ( $commit ) {
-                    $this->commit();
-                }
-
-                return $statement;
-            }
-            else {
-                throw new \PDOException($statement->errorCode() . " - " . json_encode($statement->errorInfo()));
-            }
-        }
-        catch (\PDOException $e) {
-            $this->rollback();
-
-            throw $e;
-        }
-        catch (\Throwable $e) {
-            if ( function_exists("debogueur") ) {
-                debogueur($statement, $parameters, $commit);
-            }
-
-            throw $e;
-        }
-
-        return null;
-    }
 }
diff --git a/src/ConnectionAdapter.php b/src/ConnectionAdapter.php
index 6d5f234..0bab431 100644
--- a/src/ConnectionAdapter.php
+++ b/src/ConnectionAdapter.php
@@ -14,7 +14,7 @@ class ConnectionAdapter extends \Ulmus\ConnectionAdapter
 
     protected AdapterInterface $adapter;
 
-    public $connection;
+    private $connection;
 
     public function resolveConfiguration() : void
     {
diff --git a/src/Entity/Container.php b/src/Entity/Container.php
deleted file mode 100644
index c2e088f..0000000
--- a/src/Entity/Container.php
+++ /dev/null
@@ -1,10 +0,0 @@
-<?php
-
-
-namespace Ulmus\Ldap\Entity;
-
-
-class Container
-{
-
-}
\ No newline at end of file
diff --git a/src/Entity/OrganizationalUnit.php b/src/Entity/OrganizationalUnit.php
new file mode 100644
index 0000000..6cf868c
--- /dev/null
+++ b/src/Entity/OrganizationalUnit.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace Ulmus\Ldap\Entity;
+
+use Ulmus\Ldap\Entity\Field\{ Datetime };
+
+/**
+ * @ObjectClass('organizationalUnit')
+ */
+class OrganizationalUnit
+{
+    use \Ulmus\Ldap\EntityTrait;
+
+    /**
+     * @Id
+     */
+    public string $ou;
+
+    /**
+     * @Field
+     */
+    public string $description;
+
+    /**
+     * @Field('name' => "st")
+     */
+    public string $state;
+
+    /**
+     * @Field('name' => 'physicalDeliveryOfficeName')
+     */
+    public string $officeName;
+
+    /**
+     * @Field('name' => 'postalAddress')
+     */
+    public string $address;
+
+    /**
+     * @Field
+     */
+    public string $postalCode;
+
+    /**
+     * @Field
+     */
+    public string $telephoneNumber;
+
+    public function __toString() : string
+    {
+        return $this->ou;
+    }
+}
\ No newline at end of file
diff --git a/src/Entity/User.php b/src/Entity/User.php
index c6cdabc..1037d47 100644
--- a/src/Entity/User.php
+++ b/src/Entity/User.php
@@ -4,6 +4,9 @@ namespace Ulmus\Ldap\Entity;
 
 use Ulmus\Ldap\Entity\Field\{ Datetime };
 
+/**
+ * @ObjectClass('user')
+ */
 class User
 {
     use \Ulmus\Ldap\EntityTrait;
@@ -125,6 +128,6 @@ class User
 
     public function __toString() : string
     {
-        return $this->displayName;
+        return implode(' ', array_filter([ $this->firstname ?? "", $this->lastname ?? "" ])) ?: $this->displayName;
     }
 }
\ No newline at end of file
diff --git a/src/EntityTrait.php b/src/EntityTrait.php
index 15c8083..88f50e5 100644
--- a/src/EntityTrait.php
+++ b/src/EntityTrait.php
@@ -4,41 +4,26 @@ namespace Ulmus\Ldap;
 
 use Ulmus\{ Ulmus, EventTrait, Query, Common\EntityResolver, Common\EntityField };
 
-use Ulmus\Annotation\Classes\{ Method, Table, Collation, };
-use Ulmus\Annotation\Property\{ Field, Filter, Relation, OrderBy, Where, Join, Virtual, On, WithJoin, };
-use Ulmus\Annotation\Property\Field\{ Id, ForeignKey, CreatedAt, UpdatedAt, Datetime as DateTime, Date, Time, Bigint, Tinyint, Text, Mediumtext, Longtext, };
-use Ulmus\Annotation\Property\Relation\{ Ignore as RelationIgnore };
+use Ulmus\Ldap\Annotation\Classes\{ ObjectClass, };
 
 trait EntityTrait {
     use \Ulmus\EntityTrait;
 
-    /**
-     * @Ignore
-     */
     public static function resolveEntity() : EntityResolver
     {
         return Ulmus::resolveEntity(static::class);
     }
 
-    /**
-     * @Ignore
-     */
     public static function repository(string $alias = Repository::DEFAULT_ALIAS) : Repository
     {
         return new Repository(static::class, $alias);
     }
 
-    /**
-     * @Ignore
-     */
     public static function field($name, ? string $alias = null) : EntityField
     {
         return new EntityField(static::class, $name, $alias ?: Repository::DEFAULT_ALIAS, Ulmus::resolveEntity(static::class));
     }
 
-    /**
-     * @Ignore
-     */
     public static function fields(array $fields, ? string $alias = null) : string
     {
         return implode(', ', array_map(function($item) use ($alias){
diff --git a/src/Query/Filter.php b/src/Query/Filter.php
index b752dc5..d0470e6 100644
--- a/src/Query/Filter.php
+++ b/src/Query/Filter.php
@@ -31,7 +31,7 @@ class Filter extends Fragment {
         $this->condition = $condition;
         $this->parent = $queryBuilder->Filter ?? null;
     }
-    
+
     public function add($field, $value, string $operator, string $condition, bool $not = false) : self
     {
         $this->conditionList[] = [
@@ -61,8 +61,10 @@ class Filter extends Fragment {
             }
         }
 
+        $render = implode('', $stack);
+
         return [
-            'filters' => implode('', $stack)
+            'filters' => count($stack) > 1 ? $latest->applyOperator($render) : $render
         ];
     }
 
@@ -91,24 +93,22 @@ class Filter extends Fragment {
             {
                 $value = $this->value();
 
-                return $this->content ?: $this->content = implode("", array_filter([
-                    "(",
-                    $this->condition,
-                    $this->not ? Filter::CONDITION_NOT : "",
+                $return = $this->content ?: $this->content = implode("", array_filter([
                     $this->field,
                     $this->operator(),
-                    $value,
-                    ")",
+                    $this->operator === Filter::OPERATOR_LIKE ? "*{$this->value}*" : $value,
                 ]));
+
+                return $this->applyOperator($return, "");
             }
 
             protected function operator() : string
             {
-                if ( is_array($this->value) ) {
-                    return (in_array($this->operator, [ '!=', '<>' ]) ? Filter::CONDITION_NOT . " " : "") . Filter::COMPARISON_IN;
-                }
+                return $this->operator === Filter::OPERATOR_LIKE ? "=" : $this->operator;
+            }
 
-                return $this->operator;
+            public function applyOperator(string $content, string $operator = Filter::CONDITION_AND) {
+                return "($operator$content)";
             }
 
             protected function value()
diff --git a/src/Repository.php b/src/Repository.php
index 8971229..7089ba3 100644
--- a/src/Repository.php
+++ b/src/Repository.php
@@ -2,12 +2,15 @@
 
 namespace Ulmus\Ldap;
 
-use Ulmus\Ulmus;
+use Ulmus\Ldap\Annotation\Classes\ObjectClass;
+use Ulmus\{EntityCollection, Ulmus, SearchRequest, Query};
 use Ulmus\Annotation\Property\{ Where, Having, Relation, Join, WithJoin, Relation\Ignore as RelationIgnore };
 use Ulmus\Common\EntityResolver;
 
 class Repository extends \Ulmus\Repository
 {
+    use Repository\ConditionTrait;
+
     const DEFAULT_ALIAS = "";
 
     public array $events = [];
@@ -17,14 +20,45 @@ class Repository extends \Ulmus\Repository
 
         $this->queryBuilder = new QueryBuilder();
     }
-    
+
     protected function selectSqlQuery() : self
     {
         if ( null === $this->queryBuilder->getFragment(Query\Select::class) ) {
             $this->select(array_keys($this->entityResolver->fieldList(EntityResolver::KEY_COLUMN_NAME)));
         }
-        
+
+        if ( null !== $objectClass = $this->entityResolver->getAnnotationFromClassname( ObjectClass::class ) ) {
+            $this->where('objectclass', $objectClass->type);
+        }
+
         return $this;
     }
 
+    public function escapeValue(string $identifier) : string
+    {
+        return $this->adapter->adapter()->escapeIdentifier($identifier, Adapter\Ldap::IDENTIFIER_FILTER);
+    }
+
+    public function filterServerRequest(SearchRequest\SearchRequestInterface $searchRequest, bool $count = true) : self
+    {
+        if ($count) {
+            $this->eventRegister(new class($searchRequest) implements \Ulmus\Event\Repository\CollectionFromQueryInterface {
+
+                protected SearchRequest\SearchRequestInterface $searchRequest;
+
+                public function __construct(SearchRequest\SearchRequestInterface $searchRequest) {
+                    $this->searchRequest = $searchRequest;
+                }
+
+                public function execute(EntityCollection $collection) : EntityCollection
+                {
+                    $this->searchRequest->count = $collection->count();
+
+                    return $collection;
+                }
+            });
+        }
+
+        return parent::filterServerRequest($searchRequest, false);
+    }
 }
\ No newline at end of file
diff --git a/src/Repository/ConditionTrait.php b/src/Repository/ConditionTrait.php
index 7f2fc7c..1e83ed4 100644
--- a/src/Repository/ConditionTrait.php
+++ b/src/Repository/ConditionTrait.php
@@ -4,35 +4,20 @@ namespace Ulmus\Ldap\Repository;
 
 use Ulmus\Query;
 
+use Ulmus\Repository;
+
+use Ulmus\Ldap\Query\Filter;
+
 trait ConditionTrait 
 {
-    public function open(string $condition = Query\Where::CONDITION_AND) : self
+    public function where($field, $value, string $operator = Query\Where::OPERATOR_EQUAL, $condition = Query\Where::CONDITION_AND) : Repository
     {
-        $this->queryBuilder->open($condition);
-        
+        $this->queryBuilder->where($this->escapeField($field), $this->escapeValue($value), $operator, $condition);
+
         return $this;
     }
 
-    public function orOpen() : self
-    {
-        return $this->open(Query\Where::CONDITION_OR);
-    }
-
-    public function close() : self
-    {
-        $this->queryBuilder->close();
-        
-        return $this;
-    }
-
-    public function where($field, $value, string $operator = Query\Where::OPERATOR_EQUAL, $condition = Query\Where::CONDITION_AND) : self
-    {
-        $this->queryBuilder->where($field, $value, $operator, $condition);
-        
-        return $this;
-    }
-
-    public function wheres(array $fieldValues, string $operator = Query\Where::OPERATOR_EQUAL) : self
+    public function wheres(array $fieldValues, string $operator = Query\Where::OPERATOR_EQUAL) : Repository
     {
         foreach($fieldValues as $field => $value) {
             $this->where($field, $value, $operator);
@@ -41,108 +26,108 @@ trait ConditionTrait
         return $this;
     }
     
-    public function and($field, $value, string $operator = Query\Where::OPERATOR_EQUAL) : self
+    public function and($field, $value, string $operator = Query\Where::OPERATOR_EQUAL) : Repository
     {
         return $this->where($field, $value, $operator);
     }
 
-    public function or($field, $value, string $operator = Query\Where::OPERATOR_EQUAL) : self
+    public function or($field, $value, string $operator = Query\Where::OPERATOR_EQUAL) : Repository
     {
-        $this->queryBuilder->where($field, $value, $operator, Query\Where::CONDITION_OR);
+        $this->queryBuilder->where($this->escapeField($field), $this->escapeValue($value), $operator, Query\Where::CONDITION_OR);
         
         return $this;
     }
 
-    public function notWhere($field, $value, string $operator = Query\Where::OPERATOR_NOT_EQUAL) : self
+    public function notWhere($field, $value, string $operator = Query\Where::OPERATOR_NOT_EQUAL) : Repository
     {
-        $this->queryBuilder->where($field, $value, $operator, Query\Where::CONDITION_AND, true);
+        $this->queryBuilder->where($this->escapeField($field), $this->escapeValue($value), $operator, Query\Where::CONDITION_AND, true);
         
         return $this;
     }
 
-    public function orNot($field, $value, string $operator = Query\Where::OPERATOR_NOT_EQUAL) : self
+    public function orNot($field, $value, string $operator = Query\Where::OPERATOR_NOT_EQUAL) : Repository
     {
-        $this->queryBuilder->notWhere($field, $value, $operator, Query\Where::CONDITION_OR, true);
+        $this->queryBuilder->notWhere($this->escapeField($field), $this->escapeValue($value), $operator, Query\Where::CONDITION_OR, true);
+
+        return $this;
+    }
+
+    public function having($field, $value, string $operator = Query\Where::OPERATOR_EQUAL, $condition = Query\Where::CONDITION_AND) : Repository
+    {
+        $this->where($field, $value, $operator, $condition);
         
         return $this;
     }
 
-    public function having($field, $value, string $operator = Query\Where::OPERATOR_EQUAL, $condition = Query\Where::CONDITION_AND) : self
+    public function orHaving($field, $value, string $operator = Query\Where::OPERATOR_EQUAL) : Repository
     {
-        $this->queryBuilder->having($field, $value, $operator, $condition);
+        $this->orWhere($field, $value, $operator, Query\Where::CONDITION_OR);
         
         return $this;
     }
 
-    public function orHaving($field, $value, string $operator = Query\Where::OPERATOR_EQUAL) : self
+    public function notHaving($field, $value, string $operator = Query\Where::OPERATOR_NOT_EQUAL) : Repository
     {
-        $this->queryBuilder->having($field, $value, $operator, Query\Where::CONDITION_OR);
+        $this->queryBuilder->where($this->escapeField($field), $this->escapeValue($value), $operator, Query\Where::CONDITION_AND, true);
         
         return $this;
     }
 
-    public function notHaving($field, $value, string $operator = Query\Where::OPERATOR_NOT_EQUAL) : self
+    public function orNotHaving($field, $value) : Repository
     {
-        $this->queryBuilder->having($field, $value, $operator, Query\Where::CONDITION_AND, true);
-        
-        return $this;
-    }
-
-    public function orNotHaving($field, $value) : self
-    {
-        $this->queryBuilder->having($field, $value, Query\Where::OPERATOR_NOT_EQUAL, Query\Where::CONDITION_OR, true);
+        $this->queryBuilder->where($this->escapeField($field), $this->escapeValue($value), Query\Where::OPERATOR_NOT_EQUAL, Query\Where::CONDITION_OR, true);
         
         return $this;
     }
     
-    public function in($field, $value, string $operator = Query\Where::OPERATOR_EQUAL) : self
+    public function in($field, $value, string $operator = Query\Where::OPERATOR_EQUAL) : Repository
     {
-        $this->queryBuilder->where($field, $value, $operator);
+//        $this->queryBuilder->where($field, $value, $operator);
         
         return $this;
     }
 
-    public function orIn($field, $value, string $operator = Query\Where::OPERATOR_EQUAL) : self
+    public function orIn($field, $value, string $operator = Query\Where::OPERATOR_EQUAL) : Repository
     {
-        $this->queryBuilder->where($field, $value, $operator, Query\Where::CONDITION_OR);
+//        $this->queryBuilder->where($field, $value, $operator, Query\Where::CONDITION_OR);
         
         return $this;
     }
 
-    public function notIn($field, $value) : self
+    public function notIn($field, $value) : Repository
     {
-        $this->queryBuilder->where($field, $value, Query\Where::OPERATOR_NOT_EQUAL);
+//        $this->queryBuilder->where($field, $value, Query\Where::OPERATOR_NOT_EQUAL);
         
         return $this;
     }
 
-    public function orNotIn($field, $value) : self
+    public function orNotIn($field, $value) : Repository
     {
-        return $this->orNot($field, $value, Query\Where::OPERATOR_NOT_EQUAL, Query\Where::CONDITION_OR, true);
+//        return $this->orNot($field, $value, Query\Where::OPERATOR_NOT_EQUAL, Query\Where::CONDITION_OR, true);
     }
 
-    public function like($field, $value) : self
+    public function like($field, $value) : Repository
     {
-        $this->where($field, $value, Query\Where::OPERATOR_LIKE);
+        $this->where($field, $value, Filter::OPERATOR_LIKE);
         
         return $this;
     }
 
-    public function orLike($field, $value) : self
+    public function orLike($field, $value) : Repository
     {
-        $this->or($field, $value, Query\Where::OPERATOR_LIKE);
+        $this->or($field, $value, Filter::OPERATOR_LIKE);
         
         return $this;
     }
 
-    public function notLike($field, $value) : self
+    public function notLike($field, $value) : Repository
     {
-        $this->notWhere($field, $value, Query\Where::OPERATOR_LIKE);
+        $this->notWhere($field, $value, Filter::OPERATOR_LIKE);
         
         return $this;
     }
 
-    public function likes(array $fieldValues, string $condition = Query\Where::CONDITION_AND) : self
+    public function likes(array $fieldValues, string $condition = Query\Where::CONDITION_AND) : Repository
     {
         foreach($fieldValues as $field => $value) {
             $this->like($field, $value);